Bobbin



Feb. 1925. 1,525,648

E. J. HUBBARD Boanzn Filed April 14, 1924 2 2. 25 M I 46 3 .5 w IPatented Feb. 10, 1925.

UNITED STATES EBER J. HUBBARD, OF BERWYN, ILLINOIS.

BOBBIN.

Application filed April 14, 1924. Serial No. 706,263.

To all whom it may concern:

Be it known that I, EBER J. HUBBAPD, a citizen of the United States, anda resident of Berwyn, in the count-y of Cook and State of Illinois, haveinvented certain new and useful Improvements in Bobbins, of which thefollowing is a specification.

My invention relates to bobbins known in the art as roving bobbins andused in the cotton industry for receiving cotton yarn or thread. Suchbobbins usually comprise a hollow shank and a supporting base thereforwith means for connecting the base in driving relation with a rotatingpedestal from which a pivot spindle extends upwardly through the bobbinshank. Bobbins have been constructed entirely of wood and also entirelyof metal. Both have advantages. 00d is lighter, but may be easilychipped, split and warped and also readily burned. wooealso presents arough surface from which it is diiiicult to strip off surplus thread oryarn. When the bobbin is constructed entirely of sheet metal, such metalparticu larly along the shank must be sufficiently heavy to preventcrushing or denting and such. bobbins may therefore weigh more than woodbobbins. The advantages of metal bobbins are that they are fireproof,will hold their shape better, and will present a smooth surface. Theobject of my invention is to construct a. bobbin combining theadvantages of the all wood and the all metalbobbin. In general myimproved construction com prises an inner or foundation structure ofwood or other suitable nonmetallic material and an outer structuresheathing of thin sheet metal, the inner structure beingof justsufficient thickness and volume to sufficiently strengthen the shankportion of the sheathing and to provide sufficient bushing at the topand at the base for engagement with the supporting spindle and rotatingpedestal, respectively. The inner structure and the sheathing structureare preferably sectional and other features of the invention reside inimproved and practical means for securing the sections together to formthe rigid bobbin with a. smooth exteriorsurface. The above andotherfeatures of my invention are incorporated in the structure shown onthe accompanying drawing, in which-- Fig. 1 is a side e-levational view,

Fig. 2 is a diametral vertical sectional view,

Fig. 3 is a sectional view on plane 8-3, Fig. 1,

Fig. 4 is a view of the lower end of the boblbin before the base bushingis inserted, anc

Fig. 5 is a top view of the base section of the bobbin.

The outer or sheathing part of the bobbin comprises the shank part 10and the base part 11. The shank part is formed by rolling a rectangularblank of sheet metal to cylindrical form and joining its edgespreferably by seaming along the entire distance, as best indicated at 12Fig. The base section 11 is cylindrical at its lower port-ion, its upperportion being first inclined to form the inclined shoulder 13, and thendeflected radially inwardly to form the fiat annular shelf or seat 14.At its lower end the shank 10 has the tongues 15, and the shelf 14 ofthe base part has the slots 16 through which the tongues are extended tobe secured against the inner faces of the illclined shoulder section 13preferably by spot welding. The diameter of the shank is substantiallythe same as the diameter at the juncture of the shoulder 13 and shelf 14so that the shank and inclined shoulder merge into each other.

The inner reenforcing structure of the bobbin comprises the cylindricalshell 17 of non metallic material preferably wood, this shell being ofan outer diameter to slip fit into the sheathing 10. The shell seats atits lower end on the shelf let and the upper periphery of the sheathingis curled; inwardly and downwardly a distance into the shell end asindicated at 18, the shell being thus securely held within thesheathing. The upper section 19 of the reenforcing shell is ofrestricted diameter to provide the axial passageway 20 for receiving thespindle on which the bobbin is received when it is to be wound up orunwound. The lower wall 21 of the section 19 is sufliciently inclined sothat itwill accurately and quickly guide the upper end of the spindleinto the bearing passageway 20. l

The lower end of the base part 11 is normally straight as shown in Fig.4 so that the bushing 22 may be readily inserted. Such bushing ispreferably of wood and has the axial passageway 23 of a diameter toreceive the cylindrical lug (not shown)- on the revolving pedestal onwhich the bobbin mounted for winding or unwinding. The

bushing accurately fits the cylindrical and inclined walls 11 and 12 ofthe base part and after insertion the lower end of the cylindrical wallpart is curled inwardly and upwardly a distance into the bushing as in:dicated at 2-l, thus securely locking the bushing rigidly within thebase 14 concentric with the reenforcing shell 17 and its spindlepassageway 20. The bushing extends into engagement with the lower faceof the shelf liiso that the metal or sheathing part of the bobbin isreenforced throughout its en tire extent by the interior wood portion.The bushing has the depressions or pockets 25 for receiving the tongues15 and the bushing is thus further locked against rotational movementwithin its metal sheathing section. The rcenforcing shell 17 has thelongitudinal notch 26 in its outside for receiving the seam 12. and suchengagement locks the shell 17 against rotational movement.

In my improved construction the metal sheathing can be made of very thinsheet metal, say 30 gauge. The metal is preferably rustproof as forexample tin plate, or steel, plated, coated or treated with rustproofmetal or material. The reenforcing shell 17 has its annular wall of athickness just suflicient to resist the crushing or breaking strains towhich the bobbin might be subjected during use. The intimate connectionbetween such shell and its metal sheathing causes a cooperation betweenthe shell and sheathing which gives very great strength, yet therequired degree of resiliency. The section 19 of restricted innerdiameter forming the upper part of the reenforcing shell adds greatstrength to the upper end of the bobbin where it is exposed to blows andbumps, and the curled in part 18 of the sheathing forms an annularreenforcing rim which also adds considerable strength, and by extendinga distance beyond the upper end of the shell protects the shell endagainst splitting or slivering.

The firm seating of the shank sheathing 10 on the shelf 14L of the basepart sheathing together with the spot welding connection of the tongues15 with the base sheathing gives a very rigid and strong connection, andwhen the bushing 22 is secured in the base sheathing intimately againstthe walls thereof, a very strong and rigid bobbin base is provided, thecurled in edge 24 strengthening the lower peripheral edge of the basepart and also protectingthe wood bushing from slivering or splitting.After insertion of the bushing in the base section the base is cutradially to provide the slots 27 for receiving the teeth (not shown)extending laterally from the pedestal lugs which engage in the bushing22 when the bobbin is mounted on the pedestal for rotational movement.Usually when a bobbin is applied to a pedestal for winding it is merelyapplied with the bushing end receiving the upper end of the spindle, andis then dropped, to find its own seating on the pedestal and driving lugand tooth.

The curled in metal rim 24 will serve to protect the bobbin againstinjury when it strikes the hard metal pedestal after being applied tothe upper end of a spindle.

My improved bobbin possesses all the advantages of the all wood bobbinor the all metal bobbin and has no greater weight than such all wood orall metal bobbin. The wood part of the bobbin which is entirelyprotected by the metal sheathing gives the necessary strength andresiliency, while the thin metal sheathing insures a smooth receivingsurface for the bobbin from which any surplus yarn can be easilystripped oft. The intimate connection be tween the metal sheathing andthe reenforcing wood part will give such strength that there will be nowarping. The smooth outer metallic surface can be readily cleaned ofgrease or dirt, and as the protected inner wood part cannot come intocontact with greasy surfaces there is no chance for absorption or theaccumulation of grease or dirt by the wood. The bobbin construction isvery simple and inexpensive. When the parts are assembled thereenforcing shell 17 is first slipped into the sheathing 10'. The loweredges of the sheathing and shell are then applied to the sheathing shell14 of the base part and the tongues inserted through the slots 16 to bewelded against the base part. The upper end 18 of the shank section isthen curled in to the end of the shell. The bushing is nextinserted intothe. base sheathing and the end 24 curled in, and then the slots 27 arecut.

I do not desire to be limited to the exact construction and arrangementshown and described, as changes and modifications can be made which willstill come within the scope of the invention.

I claim as follows:

1. In a bobbin of the class described, the combination of a metallicouter part comprising a cylindrical sheet-metal shank and a sheet-metalbase, said shank and base being secured together, a flange at the upperend of said base extending within said shank to form a seat, are-enforcing shell of nonmetallic material within said shank seating atits lower end on said flange to be supported thereby, the upper end ofsaid shank being turned inwardly to secure said shell in place, and abushing of non-metallic material within said base, the lower edge ofsaid base being turned inwardly to secure said bushing in place.

2. In a bobbin of the class described, the combination of a. thin sheetmetal shank part and a thin sheet metal base part, an

annular shelf extending inwardly at the up per end of said base part,said shelf having a. plurality of slots, tongues at the lower end ofsaid shank part extending through said slots and secured against theinner side of said base part, a reenforcing shell of non-metallicmaterial within said shank part seated on said shelf, the upper end ofsaid shank part being curled inwardly and downwardly into said shell tolock said shell within said shank part, and a bushing inserted withinsaid base part, the lower edge of said base part being curled inwardlyand upwardly into said bushing to lock said bushing within the basepart.

3. In a bobbin of the class described, the combination of a thin sheetmetal shank part, a thin wooden reenforcing shell lining said shankpart, a thin sheet metal annular base part having a seating flange atits top, said shank part and its reenforcing shell seat ing at theirlower ends on said flange, slots in said seating flange, said shank parthaving tongues at its lower end extending through said slots and securedagainst the inner sides of said base part, a mounting bushing of woodwithin said base part, said base part and bushing having trans verseslots for receiving driving teeth.

l. In a bobbin of the class described, a shank part, a base part, saidshank part comprising a cylindrical shell of wood and an outer sheatingof thin sheet metal, said base part comprising a mounting bushing ofwood and a thin sheet metal sheathing therefor, said base part sheathinghaving an annular seat at its top engaged by the lower ends of saidshank part shell and sheathing, extensions on said shank part sheathingspot welded to the base part sheathing, the outer ends of said shankpart sheathing and said base part sheathing being curled inwardly intothe reinforcing shell and bushing respectively.

5. In a bobbin of the class described, the combination of a shank partand a base part, said shank part comprising an inner cylindrical shellof wood and an outer thin metal sheathing, the upper end of said shellbeing of reduced inner diameter to provide being deflected inwardly anddownwardly into the shank part shell to form a reinforcing protectingrim at the top of said shank part, the lower end of said base partsheathing being deflected inwardly and upwardly into said bushing toform a reinforcing rim for said base part, said base part havingtransverse slots for the reception of driving teeth.

6. A bobbin of the class described, comprising a cylindrical sheet metalbase, a cylindrical shank of sheet metal secured to the base concentrictherewith, an alining bushing secured in said base, a reinforcing shellextending full length of said shank and being enlarged at its upper endto form an alining bushing, said base having transverse slots forreceiving driving teeth.

7. A bobbin of the class described comprising a cylindrical base of thinsheet metal having an annular horizontal wall at its top, a cylindricalshank of thin sheet metal seated on said horizontal Wall and havingtongues spot welded to said base, an alining bushing of soft materialinserted in said base, a reinforcing shell of soft material extendingfull length in said shell and being of reduced inner diameter at itsupper end to form an alining bushing, the upper end of said shank beingcurled inwardly a distance into said shell to form a reinforcing rim,and the lower end of said base being curled inwardly a distance intosaid bushing to form a reinforcing rim for said base.

In witness whereof, I hereunto subscribe my name this 10th day of April,A. D.,

EBER J. HUBBARD.

